Electrode End Lamination Before Winding Battery Cells
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Solution Overview
Problem
During the battery cell manufacturing process, the free end of the electrode sheet tends to shift relative to the separator, compromising the safety of the battery cell.
Innovation Solution
A battery cell manufacturing device with a lamination assembly positioned upstream of the winding pin, which connects the free end of the electrode sheet to the separator using an adhesive applying assembly, a supporting mechanism, and an adjustable distance configuration to prevent shifting, ensuring secure adhesion and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrode sheet and separator are wound into a battery cell without additional fixation, then the winding process is simple and fast, but the free end of the electrode sheet shifts relative to the separator, compromising safety
Solution Approach 1:
The lamination assembly performs preliminary fixation of the free end of the electrode sheet to the separator before the winding process begins. This advance action prevents shifting during winding without requiring complex real-time control mechanisms, thus improving safety while maintaining device simplicity.
Solution Approach 2:
The lamination assembly acts as an intermediary component between the electrode sheet and separator, providing a fixing mechanism that prevents relative shifting. This intermediary structure enables reliable connection without complicating the overall winding device architecture.
2Reliability
If the lamination assembly is added to connect the free end of the electrode sheet to the separator, then the shifting problem is solved and safety is improved, but the device structure becomes more complex
Solution Approach 1:
The lamination assembly is positioned upstream of the winding pin to perform fixation before winding begins. This preliminary action ensures the free end is secured in advance, preventing shifting during the winding process while keeping the device structure relatively simple through straightforward positioning.
3Adaptability or versatility
If the distance between the supporting mechanism and adhesive applying mechanism is made adjustable, then the adaptability to different winding states is improved, but the device complexity increases
Solution Approach 1:
The distance between the supporting mechanism and adhesive applying mechanism is made adjustable rather than fixed. This dynamic configuration allows the device to adapt to different winding states and separator/electrode sheet dimensions, improving versatility while maintaining reasonable structural simplicity through straightforward adjustment mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents the free end of the electrode sheet from shifting relative to the separator during the winding process, enhancing the safety and reliability of the battery cell production by ensuring a stable connection.
Implementation Method 1
an adhesive applying assembly, configured to apply an adhesive to the free end of the electrode sheet and the separator, so that the free end of the electrode sheet is adhesively connected to the separator
Data Source
AI summary
The present application relates to a battery cell manufacturing device and method. The battery cell comprises an electrode sheet and a separator. The electrode sheet has a free end in its own extension direction. The battery cell manufacturing device includes a winding pin and a lamination assembly. The winding pin is configured to wind the electrode sheet and separator into a battery cell. The lamination assembly is disposed upstream of the winding pin, and configured to connect the free end of the electrode sheet to the separator. The battery cell manufacturing device and method provided in the embodiments of the present application solve the problem that the free end of the electrode sheet is prone to shift relative to the separator during the battery cell production process, thus ensuring the safety of the battery cell produced.